Grafana Profiles Drilldown shows misleading “Error while retrieving the plugin settings” warning for config-less app

### What happened? Title: Misleading "Error while retrieving the plugin settings" warning for config-less Profiles Drilldown app Environment: - Grafana: 11.6.0 - Plugin: grafana-pyroscope-app (Profiles Drilldown) - Plugin version: 1.15.0 - Mode: Grafana native Profiles (not Pyroscope legacy UI) Issue: When using Grafana native Profiles, the UI shows the following warning: Error while retrieving the plugin settings! Some features might not work as expected (e.g. collapsed flame graphs). However: - Profiles load correctly - Flame graphs (collapsed / diff) work as expected - No backend errors are logged The warning appears to be misleading. Key finding: The plugin settings endpoint returns HTTP 200 with valid metadata: GET /api/plugins/grafana-pyroscope-app/settings Response (abridged): { "id": "grafana-pyroscope-app", "enabled": true, "jsonData": null, "extensions": { "extensionPoints": [ { "id": "grafana-pyroscope-app/settings/v1" } ] } } Profiles Drilldown is a config-less app in Grafana native Profiles mode. jsonData = null is intentional. Suspected cause: Grafana frontend appears to treat the absence of a settings schema or jsonData as an error when a settings extension point exists, even for config-less apps. This looks like a frontend capability detection / UX issue, not a backend or configuration problem. Expected behavior: Do not show a warning for config-less apps when settings are intentionally absent. Impact: The warning causes unnecessary confusion and investigation, despite no functional impact. ### What did you expect to happen? Do not show a warning for config-less apps when settings are intentionally absent. ### Did this work before? no ### How do we reproduce it? fix this issue ### Is the bug inside a dashboard panel? no ### Environment (with versions)? Grafana: 11.6.0 OS:mac os Browser:Chrome ### Grafana platform? - Grafana: 11.6.0 - Plugin: grafana-pyroscope-app (Profiles Drilldown) - Plugin version: 1.15.0 - Mode: Grafana na…